首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   82295篇
  免费   7758篇
  国内免费   6193篇
耳鼻咽喉   531篇
儿科学   883篇
妇产科学   729篇
基础医学   9194篇
口腔科学   1288篇
临床医学   11786篇
内科学   11994篇
皮肤病学   909篇
神经病学   4049篇
特种医学   2868篇
外国民族医学   40篇
外科学   7171篇
综合类   15293篇
现状与发展   28篇
一般理论   7篇
预防医学   5748篇
眼科学   2379篇
药学   9080篇
  116篇
中国医学   5456篇
肿瘤学   6697篇
  2024年   288篇
  2023年   1416篇
  2022年   3452篇
  2021年   4359篇
  2020年   3361篇
  2019年   2676篇
  2018年   2830篇
  2017年   2634篇
  2016年   2438篇
  2015年   3747篇
  2014年   4696篇
  2013年   4241篇
  2012年   6409篇
  2011年   6958篇
  2010年   4542篇
  2009年   3690篇
  2008年   4621篇
  2007年   4691篇
  2006年   4416篇
  2005年   4236篇
  2004年   2685篇
  2003年   2421篇
  2002年   2004篇
  2001年   1888篇
  2000年   1812篇
  1999年   1833篇
  1998年   1138篇
  1997年   1148篇
  1996年   889篇
  1995年   801篇
  1994年   739篇
  1993年   432篇
  1992年   503篇
  1991年   449篇
  1990年   390篇
  1989年   330篇
  1988年   294篇
  1987年   265篇
  1986年   194篇
  1985年   135篇
  1984年   63篇
  1983年   51篇
  1982年   26篇
  1981年   22篇
  1980年   16篇
  1979年   16篇
  1966年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
目的探讨鼓膜穿刺加压灌注疗法治疗分泌性中耳炎的临床疗效。方法选择确诊为分泌性中耳炎患者88例为研究对象,所有患者采用中耳鼓膜穿刺鼓室灌注加压治疗。比较不同性质分泌物患者的临床疗效及治疗前后患者鼓室导抗图变化。结果胶冻状患者治疗时间最长,浆液性患者治疗时间最短,三组治疗时间比较差异有统计学意义(P<0.01)。浆液性总有效率94.0%,黏液性总有效率86.8%,胶冻状总有效率75.0%,三组比较有显著差异(P<0.05)。治疗前鼓室导图主要是B型,治疗后主要是A型,治疗前后比较差异有统计学意义(P<0.01)。结论鼓膜穿刺加压灌注治疗分泌性中耳炎具有较好的临床疗效。  相似文献   
4.
5.
6.
7.
This meta-analysis examined whether early decompressive craniectomy (DC) can improve control of intracranial pressure (ICP) and mortality in patients with traumatic brain injury (TBI).Medline, Cochrane, EMBASE, and Google Scholar databases were searched until May 14, 2015, using the following terms: traumatic brain injury, refractory intracranial hypertension, high intracranial pressure, craniectomy, standard care, and medical management. Randomized controlled trials in which patients with TBI received DC and non-DC medical treatments were included.Of the 84 articles identified, 8 studies were selected for review, with 3 randomized controlled trials s having a total of 256 patients (123 DCs, 133 non-DCs) included in the meta-analysis. Patients receiving DC had a significantly greater reduction of ICP and shorter hospital stay. They also seemed to have lower odds of death than patients receiving only medical management, but the P value did not reach significance (pooled odds ratio 0.531, 95% confidence interval 0.209–1.350, Z = 1.95, P = 0.183) with respect to the effect on overall mortality; a separate analysis of 3 retrospective studies yielded a similar result.Whereas DC might effectively reduce ICP and shorten hospital stay in patients with TBI, its effect in decreasing mortality has not reached statistical significance.  相似文献   
8.
目的观察前置胎盘孕妇的恐惧心理反应,做好前置胎盘孕妇的心理护理。方法由孕妇自行填写CES-D和SA2量表,进行统计学分析。结果70.2%的前置胎盘孕妇具有恐惧心理。结论在妊娠过程应提高孕妇认知水平,加强心理护理,有助于她们顺利渡过妊娠期。  相似文献   
9.

Introduction  

Positive end-expiratory pressure (PEEP)-induced lung derecruitment can be assessed by a pressure–volume (P–V) curve method or by lung computed tomography (CT). However, only the first method can be used at the bedside. The aim of the study was to compare both methods for assessing alveolar derecruitment after the removal of PEEP in patients with acute lung injury or acute respiratory distress syndrome.  相似文献   
10.
The objective of this study is to assess the efficacy and safety of herbal medicines (HMs), as a monotherapy or adjunct therapy, compared to placebo or conventional approaches in the treatment of idiopathic Parkinson's disease (PD). We conducted a systematic review of randomized controlled trials from both conventional and alternative medicine sources. Outcome measures were overall improvement, quality of life, reduction of levodopa dose, and adverse events. Nine studies were included, each testing a different HM. Six of the trials had limited internal validity due to major flaws in design, including the lack of proper randomization; insufficient blinding; unclear inclusive criteria in terms of diagnostic criteria, baseline staging, and duration of disease; lack of proper sample size calculation; and insufficient data analysis. Imbalances in gender and ethnicity among the patients in the included trials were observed. No major adverse events emerged, and no specific pattern was detected from the trials describing such data. In addition to major methodological defects, heterogeneity in (1) HM tested, (2) control treatment, and (3) outcome measure hindered in-depth data analysis and synthesis. Current evidence is insufficient to evaluate the efficacy and safety of various HMs. Further studies with improved trial design and reporting, with assessment on cost-effectiveness, quality of life, and qualitative data are warranted.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号